SlideShare uma empresa Scribd logo
1 de 22
Baixar para ler offline
BASIM ZWAIN LECTURES
DENTAL ANATOMY
PERMANENT MANDIBULAR MOLARS
Professor Dr. Basim Zwain
Faculty of Dentistry
University of Kufa
Basim.zwayen@uokufa.edu.iq
MANDIBULAR FIRST MOLAR
Principal identifying features
1- Five cusps, 2 buccal, 2 lingual, and one
distal.
2- The buccal surface is bulky (lingually
inclined) with two dev. grooves.
3- The crown is wider mesiodistally than
buccolingually.
4- Occlusal outline is rectangular in shape.
5- Two well developed roots, one mesial,
and one distal.
MANDIBULAR FIRST MOLAR
Buccal aspect
1- The mesial contact area is at the
junction of the occlusal and the
middle thirds.
2- The distal contact area is a little
lower than the mesial contact area.
3- The cervical line is regular, curving
apically.
4- There are 2 developmental grooves
between the cusps acting as lines
of division between the buccal
cusps. The mesiobuccal
developmental groove is shorter
than the distobuccal d.g.
MANDIBULAR FIRST MOLAR
Buccal aspect
5- The mesiobuccal, distobuccal, and
distal cusps are clearly visible, and
the mesiolingual, and distolingual
cusp’s tips are seen.
6- The mesiobuccal cusp is slightly
wider than the distobuccal cusp,
together making 80% of the
mesiodistal width. The distal cusp
makes the rest 20%.
7- The buccal cusps are flat occlusally,
the distal cusp is rounded.
8- The point of bifurcation of the 2
roots about 3mn below the cervical
line.
MANDIBULAR FIRST MOLAR
Lingual aspect
1- Three cusps seen (mesiolingual,
distolingual, and lingual portion
of the distal cusp). Mesiolingual
cusp is the widest mesiodistally
and has the highest cusp tip and
the distal cusp is the lowest.
2- The 2 lingual cusps are pointed,
and form obtuse angles at their
cusp tips.
3- The lingual developmental
groove extends downward for
about a 1/3 of the crown length,
and acts as a line of division
between the lingual cusps.
MANDIBULAR FIRST MOLAR
Mesial aspect
1- The crown is rhomboidal with a lingual
tilt of the buccal outline.
2- The buccal outline of the crown is
convex at the junction of the cervical
and middle thirds (buccal cervical
ridge), then the outline straightens to
the buccal cusp tip.
3- The lingual outline is less convex, with
the crest of curvature at the center of
the middle third.
4- The cervical line is irregular, higher
lingually than buccally.
MANDIBULAR FIRST MOLAR
Mesial aspect
5- The buccal cusp is flat, and the lingual
cusp is sharp, with greater cusp
height.
6- The mesial marginal ridge is located
1mm below the level of the cusp tips.
MANDIBULAR FIRST MOLAR
Distal aspect
1- Because the crown is shorter distally,
than mesially, most of the buccal,
lingual, and occlusal surfaces can be
seen from the distal aspect.
2- Distal cusp is located buccal to tooth
long axis.
3- Distal marginal ridge is short and curves
cervically to form obtuse angle.
4- The cervical line is irregular.
5- Distal root is narrower than mesial root.
MANDIBULAR FIRST MOLAR
Occlusal aspect
1- The crown is rectangular in
shape, mesiodistally longer by
1mm than buccolingually.
2- Buccolingual measurement of the
crown is greater on mesial than
on distal.
The mesiodistal measurement is
greater on buccal than on lingual.
MANDIBULAR FIRST MOLAR
Occlusal aspect
3- More of the buccal surface of
the crown can be seen than of
the lingual surface.
4- There are 5 cusps,
mesiobuccal (largest), then
mesiolingual and distolingual,
then distobuccal, then the
distal cusp.
MANDIBULAR FIRST MOLAR
5- The distal contact area is on the
distal cusp.
6- There are 4 dev. grooves:
a) Central d.g. (centrally)
b) Mesiobuccal d.g. divides the
mesiobuccal and distobuccal cusp.
c) Distobuccal d.g. It divides the
distobuccal and distal cusp.
d) Lingual d.g. It divides the
mesiolingual and distolingual cusp.
MANDIBULAR FIRST MOLAR
7- There are 3 fossae:
a) Central fossa. Roughly circular
bounded by
Distal slope of mesiobuccal cusp,
Both mesial and distal slopes of
distobuccal cusp,
Mesial slope of the distal cusp,
Distal slope of mesiolingual cusp,
Mesial slope of the distolingual
cusp.
MANDIBULAR FIRST MOLAR
b) Mesial ∆ fossa. It is distal to the
mesial marginal ridge.
c) Distal ∆ fossa. It is mesial to the
distal marginal ridge.
8- There are 3 pits:
a) Central pit. In the center of the
central fossa.
b) Mesial pit. In the mesial ∆ fossa.
c) Distal pit. In the distal ∆ fossa.
MANDIBULAR SECOND MOLAR
Principal identifying features
1- Rounded square occlusal outline.
2- Four cusps, 2 buccal, and 2 lingual.
3- Not as wide mesiodistally as 6.
4- Buccal aspect has one groove.
5- Many suppl. gr. on the occl. surface
6- Two roots which are less broad
than 6, and close together.
MANDIBULAR SECOND MOLAR
Buccal aspect
1- The crown is shorter and narrower
mesiodistally than 6.
2- There is one dev. groove dividing
the mesiobuccal and distobuccal
cusps which are equal in size.
3- Two roots (mesial and distal) are
less broad and closer together.
MANDIBULAR SECOND MOLAR
Lingual aspect
Only the lingual cusp is in view
because the tips of the lingual
cusps are higher than the buccal
cusps.
MANDIBULAR SECOND MOLAR
Mesial aspect
1- The cervical ridge buccally is less
pronounced, and the occlusal
surface is constricted
buccolingually.
2- The cervical line shows no curvature.
3- The 2 roots may be seen from this
aspect.
MANDIBULAR SECOND MOLAR
Distal aspect
1- Absence of distal cusp and
distobuccal groove.
2- Most of the occlusal surface can
be seen from this aspect.
MANDIBULAR SECOND MOLAR
Occlusal aspect
1- It is roughly rectangular.
2- The central groove is in the center,
with the lingual and buccal dev.
grooves meeting with the central
groove at right angle.
3- Four cusps, 2 buccal (mesiobuccal,
and distobuccal) and 2 lingual
(mesiolingual and distolingual).
4- Many supplemental grooves radiating
from the developmental grooves.
MANDIBULAR THIRD MOLAR
Principal identifying features
1- The crown is similar to 7 but smaller, and more rounded.
2- Two roots, short, underdeveloped, and often fused.
3- Four cusps (but may be more).
4- Lingually inclined buccal surface.
5- A great number of supplemental grooves.
DIFFERENCES BETWEEN UPPER AND LOWER MOLARS
Subject Maxillary Mandibular
1- Shape of occlusal aspect Rhomboidal Rectangular
2- Crown width Wider Bucco-lingually
than mesio-distally
Wider mesio-distally
than bucco-lingually
3- Number of roots 3 2
4- Presence of oblique ridge Yes No
5- Functional cusps 4 5
6- Shape of cusps (mesial aspect) Buccal cusp is sharp
Lingual cusp is rounded
Buccal cusp is rounded
Lingual cusp is sharp
7- Buccal cervical ridge No Yes
8- Developmental groove 6 4
9- Fossae 4 3
22
Thank you

Mais conteúdo relacionado

Mais procurados

Permanent Mandibular Central Incisor
Permanent Mandibular Central IncisorPermanent Mandibular Central Incisor
Permanent Mandibular Central IncisorAbhishek Solanki
 
Permanant Maxillary Lateral Incisor
Permanant Maxillary Lateral IncisorPermanant Maxillary Lateral Incisor
Permanant Maxillary Lateral IncisorAbhishek Solanki
 
Mandibular 2nd premolar
Mandibular 2nd premolar Mandibular 2nd premolar
Mandibular 2nd premolar dentistry
 
Permanent Mandibular Lateral Incisor
Permanent Mandibular Lateral IncisorPermanent Mandibular Lateral Incisor
Permanent Mandibular Lateral IncisorAbhishek Solanki
 
Peramanent Maxillary Canine
Peramanent Maxillary Canine Peramanent Maxillary Canine
Peramanent Maxillary Canine Dr Monika Negi
 
Development of tooth
Development of toothDevelopment of tooth
Development of toothPiyush Verma
 
Dental Occlusion
Dental OcclusionDental Occlusion
Dental Occlusiondentistry
 
Permanent Mandibular First Premolar and Differences between First and Second ...
Permanent Mandibular First Premolar and Differences between First and Second ...Permanent Mandibular First Premolar and Differences between First and Second ...
Permanent Mandibular First Premolar and Differences between First and Second ...Dr Monika Negi
 
Oral mucous membrane - Oral mucosa
Oral mucous membrane - Oral mucosaOral mucous membrane - Oral mucosa
Oral mucous membrane - Oral mucosaDr Medical
 
Trait categories helpful in describing tooth differences
Trait categories helpful in describing tooth differencesTrait categories helpful in describing tooth differences
Trait categories helpful in describing tooth differencesKuldeep Singh
 

Mais procurados (20)

Permanent Mandibular Central Incisor
Permanent Mandibular Central IncisorPermanent Mandibular Central Incisor
Permanent Mandibular Central Incisor
 
Permanant Maxillary Lateral Incisor
Permanant Maxillary Lateral IncisorPermanant Maxillary Lateral Incisor
Permanant Maxillary Lateral Incisor
 
Mandibular Premolars
Mandibular PremolarsMandibular Premolars
Mandibular Premolars
 
Mandibular Molars
Mandibular MolarsMandibular Molars
Mandibular Molars
 
Mandibular 2nd premolar
Mandibular 2nd premolar Mandibular 2nd premolar
Mandibular 2nd premolar
 
Maxillary second molar
Maxillary second molarMaxillary second molar
Maxillary second molar
 
Maxillary Second Premolar
Maxillary Second PremolarMaxillary Second Premolar
Maxillary Second Premolar
 
Permanent Mandibular Lateral Incisor
Permanent Mandibular Lateral IncisorPermanent Mandibular Lateral Incisor
Permanent Mandibular Lateral Incisor
 
Enamel
EnamelEnamel
Enamel
 
mandibular second molars
mandibular second molarsmandibular second molars
mandibular second molars
 
Peramanent Maxillary Canine
Peramanent Maxillary Canine Peramanent Maxillary Canine
Peramanent Maxillary Canine
 
Development of tooth
Development of toothDevelopment of tooth
Development of tooth
 
Dental Occlusion
Dental OcclusionDental Occlusion
Dental Occlusion
 
Dentine
Dentine Dentine
Dentine
 
Mandibular Canine
Mandibular CanineMandibular Canine
Mandibular Canine
 
Dentin
DentinDentin
Dentin
 
Permanent Mandibular First Premolar and Differences between First and Second ...
Permanent Mandibular First Premolar and Differences between First and Second ...Permanent Mandibular First Premolar and Differences between First and Second ...
Permanent Mandibular First Premolar and Differences between First and Second ...
 
Oral mucous membrane - Oral mucosa
Oral mucous membrane - Oral mucosaOral mucous membrane - Oral mucosa
Oral mucous membrane - Oral mucosa
 
Dental Pulp
Dental Pulp Dental Pulp
Dental Pulp
 
Trait categories helpful in describing tooth differences
Trait categories helpful in describing tooth differencesTrait categories helpful in describing tooth differences
Trait categories helpful in describing tooth differences
 

Semelhante a Mandibular molars

Handout, Lecture 13.pdf
Handout, Lecture 13.pdfHandout, Lecture 13.pdf
Handout, Lecture 13.pdfdent alhamdani
 
Tutorial, Lecture 13.pdf
Tutorial, Lecture   13.pdfTutorial, Lecture   13.pdf
Tutorial, Lecture 13.pdfdent alhamdani
 
Tutorial, Lecture 11.pdf
Tutorial, Lecture   11.pdfTutorial, Lecture   11.pdf
Tutorial, Lecture 11.pdfdent alhamdani
 
Permanent mandibular premolars
Permanent mandibular premolarsPermanent mandibular premolars
Permanent mandibular premolarsAhmed Ali
 
Handout, Lecture 11.pdf
Handout, Lecture 11.pdfHandout, Lecture 11.pdf
Handout, Lecture 11.pdfdent alhamdani
 
Lower Second & Third Molar
Lower Second & Third MolarLower Second & Third Molar
Lower Second & Third MolarAhmed Elhlawany
 
Tutorial, Lecture 9.pdf
Tutorial, Lecture   9.pdfTutorial, Lecture   9.pdf
Tutorial, Lecture 9.pdfdent alhamdani
 
PERMANENT MAXILLARY PREMOLARS
PERMANENT MAXILLARY PREMOLARSPERMANENT MAXILLARY PREMOLARS
PERMANENT MAXILLARY PREMOLARSRam Simsuangco
 
Tutorial, Lecture 8.pdf
Tutorial, Lecture   8.pdfTutorial, Lecture   8.pdf
Tutorial, Lecture 8.pdfdent alhamdani
 
Permanent maxillary molars dental anatomy
Permanent maxillary molars dental anatomyPermanent maxillary molars dental anatomy
Permanent maxillary molars dental anatomyAhmed Ali
 
morphology of mandibular 1st,2nd,3rd molars teeth
morphology of mandibular 1st,2nd,3rd molars teeth morphology of mandibular 1st,2nd,3rd molars teeth
morphology of mandibular 1st,2nd,3rd molars teeth Akram bhuiyan
 
Upper premolars (2)
Upper premolars (2)Upper premolars (2)
Upper premolars (2)soso157
 
Handout, Lecture 8.pdf
Handout, Lecture 8.pdfHandout, Lecture 8.pdf
Handout, Lecture 8.pdfdent alhamdani
 
Maxillary Premolars
Maxillary PremolarsMaxillary Premolars
Maxillary Premolarshchidmd
 
Textbook of dental anatomy, 2021, montether albakly
Textbook of dental anatomy,  2021, montether albaklyTextbook of dental anatomy,  2021, montether albakly
Textbook of dental anatomy, 2021, montether albaklyMONTETHERELBAKLY
 
Tutorial, Lecture 10.pdf
Tutorial, Lecture   10.pdfTutorial, Lecture   10.pdf
Tutorial, Lecture 10.pdfdent alhamdani
 
Tutorial, Lecture 12.pdf
Tutorial, Lecture   12.pdfTutorial, Lecture   12.pdf
Tutorial, Lecture 12.pdfdent alhamdani
 
Dental anatomy,max.first molar
Dental anatomy,max.first molarDental anatomy,max.first molar
Dental anatomy,max.first molarAli Alshraifi
 
Handout, Lecture 9.pdf
Handout, Lecture 9.pdfHandout, Lecture 9.pdf
Handout, Lecture 9.pdfdent alhamdani
 

Semelhante a Mandibular molars (20)

Handout, Lecture 13.pdf
Handout, Lecture 13.pdfHandout, Lecture 13.pdf
Handout, Lecture 13.pdf
 
Tutorial, Lecture 13.pdf
Tutorial, Lecture   13.pdfTutorial, Lecture   13.pdf
Tutorial, Lecture 13.pdf
 
Tutorial, Lecture 11.pdf
Tutorial, Lecture   11.pdfTutorial, Lecture   11.pdf
Tutorial, Lecture 11.pdf
 
Permanent mandibular premolars
Permanent mandibular premolarsPermanent mandibular premolars
Permanent mandibular premolars
 
Handout, Lecture 11.pdf
Handout, Lecture 11.pdfHandout, Lecture 11.pdf
Handout, Lecture 11.pdf
 
Lower Second & Third Molar
Lower Second & Third MolarLower Second & Third Molar
Lower Second & Third Molar
 
Tutorial, Lecture 9.pdf
Tutorial, Lecture   9.pdfTutorial, Lecture   9.pdf
Tutorial, Lecture 9.pdf
 
PERMANENT MAXILLARY PREMOLARS
PERMANENT MAXILLARY PREMOLARSPERMANENT MAXILLARY PREMOLARS
PERMANENT MAXILLARY PREMOLARS
 
Tutorial, Lecture 8.pdf
Tutorial, Lecture   8.pdfTutorial, Lecture   8.pdf
Tutorial, Lecture 8.pdf
 
3 premolars
3 premolars3 premolars
3 premolars
 
Permanent maxillary molars dental anatomy
Permanent maxillary molars dental anatomyPermanent maxillary molars dental anatomy
Permanent maxillary molars dental anatomy
 
morphology of mandibular 1st,2nd,3rd molars teeth
morphology of mandibular 1st,2nd,3rd molars teeth morphology of mandibular 1st,2nd,3rd molars teeth
morphology of mandibular 1st,2nd,3rd molars teeth
 
Upper premolars (2)
Upper premolars (2)Upper premolars (2)
Upper premolars (2)
 
Handout, Lecture 8.pdf
Handout, Lecture 8.pdfHandout, Lecture 8.pdf
Handout, Lecture 8.pdf
 
Maxillary Premolars
Maxillary PremolarsMaxillary Premolars
Maxillary Premolars
 
Textbook of dental anatomy, 2021, montether albakly
Textbook of dental anatomy,  2021, montether albaklyTextbook of dental anatomy,  2021, montether albakly
Textbook of dental anatomy, 2021, montether albakly
 
Tutorial, Lecture 10.pdf
Tutorial, Lecture   10.pdfTutorial, Lecture   10.pdf
Tutorial, Lecture 10.pdf
 
Tutorial, Lecture 12.pdf
Tutorial, Lecture   12.pdfTutorial, Lecture   12.pdf
Tutorial, Lecture 12.pdf
 
Dental anatomy,max.first molar
Dental anatomy,max.first molarDental anatomy,max.first molar
Dental anatomy,max.first molar
 
Handout, Lecture 9.pdf
Handout, Lecture 9.pdfHandout, Lecture 9.pdf
Handout, Lecture 9.pdf
 

Mais de Basim Zwain

Illustrations of neuromuscular transmission
Illustrations of neuromuscular transmissionIllustrations of neuromuscular transmission
Illustrations of neuromuscular transmissionBasim Zwain
 
Basim Zwain Lectures- Inheritance
Basim Zwain Lectures- InheritanceBasim Zwain Lectures- Inheritance
Basim Zwain Lectures- InheritanceBasim Zwain
 
Basim Zwain Lectures - Cell Physiology-2
Basim Zwain Lectures - Cell Physiology-2Basim Zwain Lectures - Cell Physiology-2
Basim Zwain Lectures - Cell Physiology-2Basim Zwain
 
Basim Zwain Lectures - Cell Physiology 1
Basim Zwain Lectures - Cell Physiology 1Basim Zwain Lectures - Cell Physiology 1
Basim Zwain Lectures - Cell Physiology 1Basim Zwain
 
Permanent canines
Permanent caninesPermanent canines
Permanent caninesBasim Zwain
 
Permanent maxillary lateral incisors
Permanent maxillary lateral incisorsPermanent maxillary lateral incisors
Permanent maxillary lateral incisorsBasim Zwain
 
Permanent maxillary incisors
Permanent maxillary incisorsPermanent maxillary incisors
Permanent maxillary incisorsBasim Zwain
 

Mais de Basim Zwain (7)

Illustrations of neuromuscular transmission
Illustrations of neuromuscular transmissionIllustrations of neuromuscular transmission
Illustrations of neuromuscular transmission
 
Basim Zwain Lectures- Inheritance
Basim Zwain Lectures- InheritanceBasim Zwain Lectures- Inheritance
Basim Zwain Lectures- Inheritance
 
Basim Zwain Lectures - Cell Physiology-2
Basim Zwain Lectures - Cell Physiology-2Basim Zwain Lectures - Cell Physiology-2
Basim Zwain Lectures - Cell Physiology-2
 
Basim Zwain Lectures - Cell Physiology 1
Basim Zwain Lectures - Cell Physiology 1Basim Zwain Lectures - Cell Physiology 1
Basim Zwain Lectures - Cell Physiology 1
 
Permanent canines
Permanent caninesPermanent canines
Permanent canines
 
Permanent maxillary lateral incisors
Permanent maxillary lateral incisorsPermanent maxillary lateral incisors
Permanent maxillary lateral incisors
 
Permanent maxillary incisors
Permanent maxillary incisorsPermanent maxillary incisors
Permanent maxillary incisors
 

Último

3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptxmary850239
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.raviapr7
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and stepobaje godwin sunday
 
Patterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxPatterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxMYDA ANGELICA SUAN
 
How to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesHow to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesCeline George
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxDr. Santhosh Kumar. N
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRATanmoy Mishra
 
Clinical Pharmacy Introduction to Clinical Pharmacy, Concept of clinical pptx
Clinical Pharmacy  Introduction to Clinical Pharmacy, Concept of clinical pptxClinical Pharmacy  Introduction to Clinical Pharmacy, Concept of clinical pptx
Clinical Pharmacy Introduction to Clinical Pharmacy, Concept of clinical pptxraviapr7
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17Celine George
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17Celine George
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxKatherine Villaluna
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxheathfieldcps1
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...Nguyen Thanh Tu Collection
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfMohonDas
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxDr. Asif Anas
 
Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphNetziValdelomar1
 

Último (20)

3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptx
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and step
 
Patterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptxPatterns of Written Texts Across Disciplines.pptx
Patterns of Written Texts Across Disciplines.pptx
 
How to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 SalesHow to Manage Cross-Selling in Odoo 17 Sales
How to Manage Cross-Selling in Odoo 17 Sales
 
Prelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quizPrelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quiz
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptx
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
 
Clinical Pharmacy Introduction to Clinical Pharmacy, Concept of clinical pptx
Clinical Pharmacy  Introduction to Clinical Pharmacy, Concept of clinical pptxClinical Pharmacy  Introduction to Clinical Pharmacy, Concept of clinical pptx
Clinical Pharmacy Introduction to Clinical Pharmacy, Concept of clinical pptx
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17
 
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdfPersonal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptx
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdf
 
Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptx
 
Presentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a ParagraphPresentation on the Basics of Writing. Writing a Paragraph
Presentation on the Basics of Writing. Writing a Paragraph
 

Mandibular molars

  • 1. BASIM ZWAIN LECTURES DENTAL ANATOMY PERMANENT MANDIBULAR MOLARS Professor Dr. Basim Zwain Faculty of Dentistry University of Kufa Basim.zwayen@uokufa.edu.iq
  • 2. MANDIBULAR FIRST MOLAR Principal identifying features 1- Five cusps, 2 buccal, 2 lingual, and one distal. 2- The buccal surface is bulky (lingually inclined) with two dev. grooves. 3- The crown is wider mesiodistally than buccolingually. 4- Occlusal outline is rectangular in shape. 5- Two well developed roots, one mesial, and one distal.
  • 3. MANDIBULAR FIRST MOLAR Buccal aspect 1- The mesial contact area is at the junction of the occlusal and the middle thirds. 2- The distal contact area is a little lower than the mesial contact area. 3- The cervical line is regular, curving apically. 4- There are 2 developmental grooves between the cusps acting as lines of division between the buccal cusps. The mesiobuccal developmental groove is shorter than the distobuccal d.g.
  • 4. MANDIBULAR FIRST MOLAR Buccal aspect 5- The mesiobuccal, distobuccal, and distal cusps are clearly visible, and the mesiolingual, and distolingual cusp’s tips are seen. 6- The mesiobuccal cusp is slightly wider than the distobuccal cusp, together making 80% of the mesiodistal width. The distal cusp makes the rest 20%. 7- The buccal cusps are flat occlusally, the distal cusp is rounded. 8- The point of bifurcation of the 2 roots about 3mn below the cervical line.
  • 5. MANDIBULAR FIRST MOLAR Lingual aspect 1- Three cusps seen (mesiolingual, distolingual, and lingual portion of the distal cusp). Mesiolingual cusp is the widest mesiodistally and has the highest cusp tip and the distal cusp is the lowest. 2- The 2 lingual cusps are pointed, and form obtuse angles at their cusp tips. 3- The lingual developmental groove extends downward for about a 1/3 of the crown length, and acts as a line of division between the lingual cusps.
  • 6. MANDIBULAR FIRST MOLAR Mesial aspect 1- The crown is rhomboidal with a lingual tilt of the buccal outline. 2- The buccal outline of the crown is convex at the junction of the cervical and middle thirds (buccal cervical ridge), then the outline straightens to the buccal cusp tip. 3- The lingual outline is less convex, with the crest of curvature at the center of the middle third. 4- The cervical line is irregular, higher lingually than buccally.
  • 7. MANDIBULAR FIRST MOLAR Mesial aspect 5- The buccal cusp is flat, and the lingual cusp is sharp, with greater cusp height. 6- The mesial marginal ridge is located 1mm below the level of the cusp tips.
  • 8. MANDIBULAR FIRST MOLAR Distal aspect 1- Because the crown is shorter distally, than mesially, most of the buccal, lingual, and occlusal surfaces can be seen from the distal aspect. 2- Distal cusp is located buccal to tooth long axis. 3- Distal marginal ridge is short and curves cervically to form obtuse angle. 4- The cervical line is irregular. 5- Distal root is narrower than mesial root.
  • 9. MANDIBULAR FIRST MOLAR Occlusal aspect 1- The crown is rectangular in shape, mesiodistally longer by 1mm than buccolingually. 2- Buccolingual measurement of the crown is greater on mesial than on distal. The mesiodistal measurement is greater on buccal than on lingual.
  • 10. MANDIBULAR FIRST MOLAR Occlusal aspect 3- More of the buccal surface of the crown can be seen than of the lingual surface. 4- There are 5 cusps, mesiobuccal (largest), then mesiolingual and distolingual, then distobuccal, then the distal cusp.
  • 11. MANDIBULAR FIRST MOLAR 5- The distal contact area is on the distal cusp. 6- There are 4 dev. grooves: a) Central d.g. (centrally) b) Mesiobuccal d.g. divides the mesiobuccal and distobuccal cusp. c) Distobuccal d.g. It divides the distobuccal and distal cusp. d) Lingual d.g. It divides the mesiolingual and distolingual cusp.
  • 12. MANDIBULAR FIRST MOLAR 7- There are 3 fossae: a) Central fossa. Roughly circular bounded by Distal slope of mesiobuccal cusp, Both mesial and distal slopes of distobuccal cusp, Mesial slope of the distal cusp, Distal slope of mesiolingual cusp, Mesial slope of the distolingual cusp.
  • 13. MANDIBULAR FIRST MOLAR b) Mesial ∆ fossa. It is distal to the mesial marginal ridge. c) Distal ∆ fossa. It is mesial to the distal marginal ridge. 8- There are 3 pits: a) Central pit. In the center of the central fossa. b) Mesial pit. In the mesial ∆ fossa. c) Distal pit. In the distal ∆ fossa.
  • 14. MANDIBULAR SECOND MOLAR Principal identifying features 1- Rounded square occlusal outline. 2- Four cusps, 2 buccal, and 2 lingual. 3- Not as wide mesiodistally as 6. 4- Buccal aspect has one groove. 5- Many suppl. gr. on the occl. surface 6- Two roots which are less broad than 6, and close together.
  • 15. MANDIBULAR SECOND MOLAR Buccal aspect 1- The crown is shorter and narrower mesiodistally than 6. 2- There is one dev. groove dividing the mesiobuccal and distobuccal cusps which are equal in size. 3- Two roots (mesial and distal) are less broad and closer together.
  • 16. MANDIBULAR SECOND MOLAR Lingual aspect Only the lingual cusp is in view because the tips of the lingual cusps are higher than the buccal cusps.
  • 17. MANDIBULAR SECOND MOLAR Mesial aspect 1- The cervical ridge buccally is less pronounced, and the occlusal surface is constricted buccolingually. 2- The cervical line shows no curvature. 3- The 2 roots may be seen from this aspect.
  • 18. MANDIBULAR SECOND MOLAR Distal aspect 1- Absence of distal cusp and distobuccal groove. 2- Most of the occlusal surface can be seen from this aspect.
  • 19. MANDIBULAR SECOND MOLAR Occlusal aspect 1- It is roughly rectangular. 2- The central groove is in the center, with the lingual and buccal dev. grooves meeting with the central groove at right angle. 3- Four cusps, 2 buccal (mesiobuccal, and distobuccal) and 2 lingual (mesiolingual and distolingual). 4- Many supplemental grooves radiating from the developmental grooves.
  • 20. MANDIBULAR THIRD MOLAR Principal identifying features 1- The crown is similar to 7 but smaller, and more rounded. 2- Two roots, short, underdeveloped, and often fused. 3- Four cusps (but may be more). 4- Lingually inclined buccal surface. 5- A great number of supplemental grooves.
  • 21. DIFFERENCES BETWEEN UPPER AND LOWER MOLARS Subject Maxillary Mandibular 1- Shape of occlusal aspect Rhomboidal Rectangular 2- Crown width Wider Bucco-lingually than mesio-distally Wider mesio-distally than bucco-lingually 3- Number of roots 3 2 4- Presence of oblique ridge Yes No 5- Functional cusps 4 5 6- Shape of cusps (mesial aspect) Buccal cusp is sharp Lingual cusp is rounded Buccal cusp is rounded Lingual cusp is sharp 7- Buccal cervical ridge No Yes 8- Developmental groove 6 4 9- Fossae 4 3